Fix memory leaks & data races in tests (#4772)

* Add a few pre-made sanitizer suppressions

* Test Sanitization: Fix threading issues

* Test Sanitization: Allow deletion of PubSub

We still don't delete it in main code, but this allows us to try
deleting it in tests.

* Test Sanitization: Fix some memory leaks

* fix gtest clang-tidy warning

* const emojis test :-)

src/providers/twitch/PubSubManager.hpp

@@ -77,8 +77,6 @@ public:
 
     void setAccountData(QString token, QString userID);
 
-    ~PubSub() = delete;
-
     enum class State {
         Connected,
         Disconnected,